Can anyone shed light on what is involved in repairing a unit showing that error?

Thanks,
Reg

Hi Reg,

By checking out the error codes in the "Tektronix 11801, 11802, and SM11 Diagnostics" document (on TekWiki, 11801 scope page), it shows from page 431 onward that the Time Base error index T232X points to the strobe generator. But then on page 435, only the error codes T2321-T2324 are indicated. Apparently, T2325 is added for a later 11801 model scope.

Maybe this helps you further.

Kind regards,
Gerard